Display screen or portion thereof of a device with graphical user interface for a welding system



The FIGURE is a front view of a display screen or portion thereof of a device with graphical user interface for a welding system.

The outermost broken lines illustrate a display screen and form no part of the claimed design. The remaining broken lines illustrate portions of the graphical user interface and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof of a device with graphical user interface for a welding system, as shown and described. 